The plus sign (+) represents addition: combining two or more quantities or increasing a quantity to find the total, with the numbers being added called addends and the result the sum. It is used to interpret and write addition expressions and equations with whole numbers, including sums within 20, and to connect concrete quantities, drawings, number lines, and written number sentences; algebraic, signed-number, and more generalized uses are outside this scope.
The plus sign means add or put together. It tells us to combine quantities to find the total.
Example: Mia has 5 apples. Her friend gives her 3 more apples. How many apples does Mia have now?
The numbers being added, and , are called addends. The answer, , is called the sum.
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